Environment variables are a set of dynamic named values that can affect the way running processes will behave on a computer.
They are part of the environment in which a process runs. For example, a running process can query the value of the TEMP environment variable to discover a suitable location to store temporary files, or the HOME or USERPROFILE variable to find the directory structure owned by the user running the process.
They were introduced in their modern form in 1979 with Version 7 Unix, so are included in all Unix operating system flavors and variants from that point onward including Linux and OS X. From PC DOS 2.0 in 1982, all succeeding Microsoft operating systems including Microsoft Windows, and OS/2 also have included them as a feature, although with somewhat different syntax, usage and standard variable names.
In all Unix and Unix-like systems, each process has its own separate set of environment variables. By default, when a process is created, it inherits a duplicate environment of its parent process, except for explicit changes made by the parent when it creates the child. At the API level, these changes must be done between running fork
and exec
. Alternatively, from command shells such as bash, a user can change environment variables for a particular command invocation by indirectly invoking it via env
or using the ENVIRONMENT_VARIABLE=VALUE <command>
notation. All Unix operating system flavors, DOS, and Windows have environment variables; however, they do not all use the same variable names. A running program can access the values of environment variables for configuration purposes.
CLS may refer to:
In computing, CLS
(for clear screen) is a command used by the command line interpreters COMMAND.COM and CMD.EXE on DOS, OS/2 and Microsoft Windows operating systems to clear the screen or console window of commands and any output generated by them. It does not clear the user's history of commands, however. The command is also available in the DEC RT-11 operating system. In other environments, such as Linux and Unix, the same functionality is provided by the clear command.
While the ultimate origins of using the three-character string CLS as the command to clear the screen likely predate Microsoft's use, this command was present before its MS-DOS usage, in the embedded ROM BASIC dialects Microsoft wrote for early 8-bit microcomputers (such as TRS-80 Color BASIC), where it served the same purpose. The MS-DOS dialects of BASIC written by Microsoft, BASICA and GW-BASIC, also have the CLS command as a BASIC keyword - as do various non-Microsoft implementations of BASIC such as BBC BASIC found on the BBC Micro computers. The CLS command is also present in BASIC versions for Microsoft Windows, however this generally clears text printed on the form, rather than the whole screen or controls on the form.
Say you gottta leave. 5 more minutes, 5 more minutes baby, 5 more minutes
Say you gotta go, working over 5 all I need is 5 more minutes of your time
(Chorus)
Hate when the seconds fly when I'm with the one I love, that's you, that's
I saver every single touch that's why I'm feeling you so much, it's true
That you
Your kiss is so sweet, you got me saying please stay open, open without me
I seen you look at your void, swear I'll get more
Stay open, open without me, ooh ooh ooh ooh ooh ooh (yeah you make me go)
Ooh ooh ooh yeah ooh ooh ooh (yeah you make me go) ooh ooh ooh ooh 24-7
Red eyes in the morning, staying up all night
I'm talking to you on the phone yeah you think I've had a red up fly
You think am an addict, but you my only habit
When it comes to you, girl I gotta have it
Hate they way the seconds fly, when I'm with the one I love, that's you
That's you
I saver every single touch that's why I'm feeling you so much, it's true
That you
Your kiss is so sweet, you got me saying please, stay open, open without me
I seen you look at your void, I swear I'll get you more
Stay open, open without me, ooh ooh ooh ooh ooh ooh (yeah you make me go)
Ooh, ooh, ooh yeah ooh, ooh, ooh yeah you make me go ooh ooh, ooh, ooh 24-7
Ooh, ooh, ooh, ooh, ooh, ooh x3
Your kiss is so sweet, you got me saying please stay open, open without me
I seen you look at your void, swear I'll get you more
Stay open, open without me, ooh, ooh, ooh (yeah you make me go) ooh, ooh, ooh
Yeah ooh x3 yeah you make me go oohx4 24-7
You make me go uh, you make me go uh
You make me go uh 24-7 babe
You make me go, you make me go let go 24-7 darling (oohx3)